The invention provides a fully-degradable liquid film for paddy fields, and belongs to the field of agricultural production and application. The fully-degradable liquid film comprises potassium silicate, polyethylene acrylate, modified starch, glycerol, hop, fiber bundles, choline chloride and tea water. The fully-degradable liquid film has the advantages that the soil temperatures can be increased by the fully-degradable liquid film, the fully-degradable liquid film is good in water retention, the potassium silicate can be decomposed to obtain silicon fertilizers and potassium fertilizers which can be absorbed and utilized by paddy, accordingly, the problem of soil environment pollution due to mulching films can be thoroughly solved, and the labor cost generated when the mulching films are cleaned can be saved; plant nutrition can be increased, and effects of strengthening stems, resisting lodging and diseases and increasing yields can be realized; processes for manufacturing the fully-degradable liquid film are simple, the fully-degradable liquid film is good in stability, high in pertinence, convenient to transport, low in cost and easy to operate and popularize, large quantities of labor and materials can be saved, early maturity of the paddy can be promoted by 7-10 days, and positive effects of promoting the yield of the paddy can be realized.